Paper Title:

The Microstructural Properties of Microalloyed Steel after Plastometric Testing

Periodical Materials Science Forum (Volumes 567 - 568)
Main Theme Materials Structure & Micromechanics of Fracture V
Edited by Pavel Šandera
Pages 373-376
DOI 10.4028/www.scientific.net/MSF.567-568.373
Citation Tomáš Gajdzica et al., 2007, Materials Science Forum, 567-568, 373
Online since December, 2007
Authors Tomáš Gajdzica, Jiří Kliber, Milan Kotas
Keywords ASC Finishing Line, Continuous Light Mill, Microstructure, Plastometric Experiment, SBQ, Stress-Strain Characteristics, Thermomechanical Rolling
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Abstract

With the aid of an ASC-type finishing line (Automatic System Control) and continuous cooling of the rolled stock in water boxes, modern continuous light mills enable thermomechanical (controlled) rolling of SBQ-type rods (Special Bar Quality). During the thermomechanical forming (at different temperatures or cooling rates etc.), one can analyze the quality parameters of roundsection steel bars. In order to obtain better understanding to the forming conditions (temperature, strain and strain rate) and the possibility of cooling (related to its rate and time), an experiment involving continuous and discontinuous testing by means of a Gleeble plastometer was suggested. After its implementation, the attention was focused on the mathematical interpretation of the stressstrain characteristics of the steel and on metallographic observation of microstructural changes. The results achieved are of universal meaning and contribute to the theoretical understanding of controlled forming.